Reese Witherspoon's kids Ava and Deacon Phillippe star in Beyoncé's latest Ivy Park Holiday Ad

While we're familiar with Blue Ivy Carter making an appearance in mum Beyoncé's Ivy Park campaigns - it seems this year Queen Bey has enlisted the help of some other celebrity kids.

In a new holiday ad for the latest Ivy Park collaboration with Adidas, designed and owned by Beyoncé, Reese Witherspoon's kids are captured enjoying some time outdoors sporting the latest collection.

Deacon, 18 and Ava, 22 made their modelling debut together with the support of their mum, who was beyond excited her kids got the chance to spend the afternoon at Beyoncé's house.

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In the lengthy video posted to the Ivy Park Twitter page, Deacon is seen playing ping-pong in an Ivy Park tracksuit, followed by a shot of Ava sitting on a bench reading in a matching dress and hairpiece.

In another clip the two siblings are playing a game of ping-pong against each other.

The video was captioned, 'WELCOME TO THE HALLS OF IVY' celebrating the launch just in time for Christmas.

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Proud mum Reese celebrated the launch of the campaign by sharing the video to her Instagram story with the caption, "I spy @avaphillippe and @deaconphillippe in Beyoncé's house."

The actress clearly ecstatic her kids were able to participate in the project together.

It wasn't just Ava and Deacon that made an appearance in the video.

Daughter of Kobe and Vanessa Bryant, Natalia Bryant, 18, also made an appearance, while Beyoncé brought along daughter Rumi, 4, to the shoot to appear in a scene alongside big sister Blue Ivy, 9.

While the video didn't disclose when the collection would be dropping, it did encourage fans to sign up for updates on their website.